Color Registration failed - Versant 2100

I'm having color registration issue which I hope anyone out there can help. Magenta channel is printing OFF-register randomly, where portion of the image on a printed sheet is perfectly registered and other part is OFF on the same sheet. I tried swapping drums but it didn't help.

Re: Color Registration failed - Versant 2100

Technician and specialist are working on this problem for 3 days now. So far... they reinstall the software (they said it got corrupted)... still not working after that. They change a sensor... still not working. Now, they are changing a motor (IBT). I hope this will do it. I'll post an update later.

Re: Color Registration failed - Versant 2100

Our technician changed the mob sensor... that didn't do it. Now, he's replacing the Magenta drum drive, which he suspected from the very beginning. We are changing the board, too. I'll post update later on.

Re: Color Registration failed - Versant 2100

The MCU board solved the error code 42-382. The Magenta misregistrations came back after a few sheets of printing. There's another problem that is complicating the whole thing -- we can print on TEXT stocks without the "misregistration" but NOT on the COVER stocks.

Tech will be on site for again to try and figure it out. Maybe another sensor might be replaced.